501 to 525 of 625 JavaScript Jobs in London

issues, perform root cause analysis and continuously improve reliability, quality and speed of delivery. Build and maintain web-based user interfaces using React.js, modern JavaScript/TypeScript, HTML and CSS, enabling colleagues to interact effectively with data and AI based tools. Technical Excellence: Promote strong software engineering practices across backend … powered applications (e.g. copilots, assistants, agent based workflows), with a focus on reliability and real user impact. Good working knowledge of React.js and modern JavaScript/TypeScript, with experience building and maintaining production web interfaces. Proficiency with HTML and CSS, and an understanding of usability, accessibility and performance considerations. Experience ...

concepts Bachelor's Degree in Computer Science or equivalent Hands-on experience in system design, application development, testing, and operational stability Proficiency in Python, JavaScript, Java, Junit, Maven, Hibernate, Spring Boot, Spring JPA, and Spring Batch Experience developing, debugging, and maintaining code in a large corporate environment with modern programming … front-end technologies Familiarity with one or more DBMS such as Oracle or MySQL Proficiency in relevant programming languages and software tools (e.g., Python, JavaScript, Java) ABOUT US J.P. Morgan is a global leader in financial services, providing strategic advice and products to the world's most prominent corporations, governments ...

selection of more advanced courses to get you up to speed. Learn the Command Line (1.5 weeks) Learn Git & GitHub (1.5 weeks) Learn JavaScript (1.5 weeks) Learn Python 3 (1.5 weeks) JavaScript forms the foundation of almost everything you see on the Internet, so it will be essential! Python ...

selection of more advanced courses to get you up to speed. Learn the Command Line (1.5 weeks) Learn Git & GitHub (1.5 weeks) Learn JavaScript (1.5 weeks) Learn Python 3 (1.5 weeks) JavaScript forms the foundation of almost everything you see on the Internet, so it will be essential! Python ...

selection of more advanced courses to get you up to speed. Learn the Command Line (1.5 weeks) Learn Git & GitHub (1.5 weeks) Learn JavaScript (1.5 weeks) Learn Python 3 (1.5 weeks) JavaScript forms the foundation of almost everything you see on the Internet, so it will be essential! Python ...

selection of more advanced courses to get you up to speed. Learn the Command Line (1.5 weeks) Learn Git & GitHub (1.5 weeks) Learn JavaScript (1.5 weeks) Learn Python 3 (1.5 weeks) JavaScript forms the foundation of almost everything you see on the Internet, so it will be essential! Python ...

selection of more advanced courses to get you up to speed. Learn the Command Line (1.5 weeks) Learn Git & GitHub (1.5 weeks) Learn JavaScript (1.5 weeks) Learn Python 3 (1.5 weeks) JavaScript forms the foundation of almost everything you see on the Internet, so it will be essential! Python ...

selection of more advanced courses to get you up to speed. Learn the Command Line (1.5 weeks) Learn Git & GitHub (1.5 weeks) Learn JavaScript (1.5 weeks) Learn Python 3 (1.5 weeks) JavaScript forms the foundation of almost everything you see on the Internet, so it will be essential! Python ...

selection of more advanced courses to get you up to speed. Learn the Command Line (1.5 weeks) Learn Git & GitHub (1.5 weeks) Learn JavaScript (1.5 weeks) Learn Python 3 (1.5 weeks) JavaScript forms the foundation of almost everything you see on the Internet, so it will be essential! Python ...

selection of more advanced courses to get you up to speed. Learn the Command Line (1.5 weeks) Learn Git & GitHub (1.5 weeks) Learn JavaScript (1.5 weeks) Learn Python 3 (1.5 weeks) JavaScript forms the foundation of almost everything you see on the Internet, so it will be essential! Python ...

About the Company Essential Skills (Must Have) Strong technical troubleshooting across applications and infrastructure. Experience with logs, monitoring tools, Java, JavaScript and API/microservices debugging. Good understanding of cloud platforms (AWS). Familiarity with CI/CD pipelines and deployment workflows. Working knowledge of scripting (Python/Shell/… analysis. Ability to contribute to release planning and DevOps automation. Responsibilities Strong technical troubleshooting across applications and infrastructure. Experience with logs, monitoring tools, Java, JavaScript and API/microservices debugging. Good understanding of cloud platforms (AWS). Familiarity with CI/CD pipelines and deployment workflows. Working knowledge of scripting ...

Developer builds reliable, scalable applications and automation workflows that drive operational efficiency across the organisation. The role requires strong technical skills across Python, JavaScript, SQL, and cloud platforms, along with the ability to work independently and deliver high-quality solutions. Key Principles: Design, develop, and maintain software solutions supporting digital … services, APIs, and automation workflows Build and maintain RPA (Robotic Process Automation) solutions to streamline business processes Write clean, well-documented code across Python, JavaScript, and SQL Deploy and manage applications within cloud environments, ensuring reliability and scalability Participate in code reviews, testing, and debugging to maintain high standards ...

Required Skills AI ML Python JavaScript Job Summary Solution Engineer – Enterprise AI (6-Month Contract) Waterloo, London , Onsite: 5 days per week £650 - £700 per day Duration: 6 months About the Role This is not a high‐level advisory role. As a Solution Engineer you will be on the ground … platform. What You Bring Hands‐on Code: At least 2+ years of professional software development experience (OOP). Tech Stack: Proficiency in Python and JavaScript, alongside modern frameworks (React, Angular, Vue, etc.). Cloud & Data: Proven experience deploying to AWS, GCP, or Azure, alongside a strong understanding of SQL/ ...

development \n Web API design, development and maintenance \n Database development and optimisation \n Infrastructure and Server Side processes \n Front End enhancements using JavaScript/Angular \n Test automation and CI/CD improvements \n Working directly with business users and Middle Office stakeholders to understand and deliver requirements … Expert-level Python development experience \n Strong experience building and maintaining Web APIs \n Solid understanding of SQL and database design \n JavaScript, HTML and web application development experience \n Proven experience with Test-Driven Development (TDD) \n Strong focus on automated testing and deployment practices \n Experience working with ...

values innovation and continuous improvement. Key Responsibilities • Develop modern, responsive front-end experiences from detailed design specifications. • Write clean, reusable and maintainable PHP and JavaScript code. • Build and enhance functionality across our customised Moodle platform. • Perform code reviews and contribute to engineering best practice. • Support fellow developers through collaboration … that deliver real-world impact. You'll likely bring: • Commercial experience as a Full Stack Developer within a professional software environment. • Strong HTML5, CSS3, JavaScript and PHP development skills. • Experience working with MySQL and/or PostgreSQL. • Good understanding of Git version control. • Strong analytical and problem-solving skills. • Excellent ...

values innovation and continuous improvement. Key Responsibilities • Develop modern, responsive front-end experiences from detailed design specifications. • Write clean, reusable and maintainable PHP and JavaScript code. • Build and enhance functionality across our customised Moodle platform. • Perform code reviews and contribute to engineering best practice. • Support fellow developers through collaboration … that deliver real-world impact. You'll likely bring: • Commercial experience as a Full Stack Developer within a professional software environment. • Strong HTML5, CSS3, JavaScript and PHP development skills. • Experience working with MySQL and/or PostgreSQL. • Good understanding of Git version control. • Strong analytical and problem-solving skills. • Excellent ...

business logic, build clean services, and verify changes in shadow mode with zero downtime to revenue flows. Extract business rules scattered across C#, embedded JavaScript and undocumented SQL stored procedures into a clean, tested, dependency-free rules assemblies. Build new services cleanly. with proper Dependency Injection (DI), robust authentication/… happy working in it today. High proficiency in reading, understanding, and safely refactoring complex, stored-procedure-heavy database logic. Working proficiency in JavaScript/TypeScript. You’ll be interacting with both jQuery on the legacy .NET front end and modern TypeScript microservices on our sister platform. A strong "legacy technology ...

experience. Create customer documentation. Act as project manager for a feature across multiple parties. Develop with strong Python and Linux capabilities. Work with JavaScript (ExtJS, React, NextJS), HTML/CSS, and Django; basic UI/UX design skills. Design end-to-end solutions covering the full stack of web applications … demonstrable equivalent knowledge. Minimum 5 years of experience developing high-performance, data-driven websites. Experience with MVC web frameworks (Django preferred). Experience with JavaScript and Python 3.8+. Familiarity with modern web standards (HTML5, CSS3). Experience with Linux or UNIX-like systems; experience with Apache and ReactJS. Experience with ...

Help us build the future of mental health by developing our new AI Therapist for end-to-end care in the US. About Limbic Limbic’s vision is to ensure the highest quality therapy is ...

A leading global financial institution is significantly expanding its engineering team and hiring multiple Java Full-Stack Engineers across various seniority levels. You will design and deliver secure, scalable and resilient financial technology solutions, developing ...

Senior Test Engineer (AI) | SC Cleared | £600 - £650/day Inside IR35 Location: Hybrid (1 day/week) - London, Cardiff, or Glasgow Duration: 6 months Clearance: Active SC Clearance (Mandatory) The Opportunity Seeking a hands ...

blog off Digital Ocean and onto Railway Requirements Lead-level engineering ownership in a production software environment Strong full‐stack experience with TypeScript/JavaScript — comfortable across the stack rather than specialised in just one layer Experience with React for frontend and Node.js/Express for backend services Comfort moving … Cloud, AWS, Twilio, and Stripe Eligible to work in the United Kingdom Core Competencies Demonstrates strong full-stack engineering capabilities with expertise in TypeScript, JavaScript, React, and Node.js/Express, while effectively balancing technical work with business impact. Proven ability to mentor, prioritise tasks, and maintain a reliable tech infrastructure ...

Role : Junior JavaScript Engineer Client: Fintech Start-Up (Trading) Compensation: Up to £100,000 + Bonus Location: London Overview My client is a rapidly scaling fintech start-up looking for a Junior Front End Engineer (1–4 years’ experience) to join their growing team of talented software engineers. This … ensuring high performance and reliability Gaining hands-on mentorship from senior engineers in a fast-moving environment Requirements 1–4 years’ experience working with JavaScript Experience with modern JavaScript frameworks such as React or React Native Solid understanding of front-end fundamentals (component design, state management, performance) Some exposure ...

practices in mobile development. Drive continuous improvement initiatives to enhance development processes and workflows. Required qualifications, capabilities and skills: Formal training or certification on JavaScript concepts and proficient advanced experience Strong knowledge of JavaScript, TypeScript, and ES6+ syntax Ability to write testable, clean JavaScript code Familiarity with writing unit tests … written and verbal communication skills in English Preferred qualifications, capabilities and skills: Proficiency in React framework Building applications using React Native in TypeScript or JavaScript Native application development across Android/iOS in Kotlin/Swift Understanding of REST APIs and GraphQL Comfortable working with projects partially or fully using ...

Drive continuous improvement initiatives to enhance development processes and workflows. Required qualifications Proficiency in React framework Building applications using React Native in TypeScript or JavaScript Native application development across Android/iOS in Kotlin/Swift Understanding of REST APIs and GraphQL Ability to write testable, clean JavaScript code Comfortable … experience with design systems, component libraries, and implementing consistent UI/UX across large-scale applications Preferred qualifications Formal training or certification on JavaScript concepts and proficient advanced experience Strong knowledge of JavaScript, TypeScript, and ES6+ syntax Familiarity with writing unit tests Ability to work in a dynamic, agile environment ...